51 lines
2.0 KiB
Ruby
51 lines
2.0 KiB
Ruby
module RQRCode
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module Renderers
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class SVG
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class << self
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# Render the SVG from the qrcode string provided from the RQRCode gem
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# Options:
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# offset - Padding around the QR Code (e.g. 10)
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# unit - How many pixels per module (Default: 11)
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# fill - Background color (e.g "ffffff" or :white)
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# color - Foreground color for the code (e.g. "000000" or :black)
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def render(qrcode, options={})
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offset = options[:offset].to_i || 0
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color = options[:color] || "000"
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unit = options[:unit] || 11
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# height and width dependent on offset and QR complexity
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dimension = (qrcode.modules.count*unit) + (2*offset)
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xml_tag = %{<?xml version="1.0" standalone="yes"?>}
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open_tag = %{<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ev="http://www.w3.org/2001/xml-events" width="#{dimension}" height="#{dimension}">}
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close_tag = "</svg>"
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result = []
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for c in 0...qrcode.modules.count
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tmp = []
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for r in 0...qrcode.modules.count
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y = c*unit + offset
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x = r*unit + offset
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next unless qrcode.qrcode.checked?(c, r)
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tmp << %{<rect width="#{unit}" height="#{unit}" x="#{x}" y="#{y}" style="fill:##{color}"/>}
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end
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result << tmp.join("\n")
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end
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if options[:fill]
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result.unshift %{<rect width="#{dimension}" height="#{dimension}" x="0" y="0" style="fill:##{options[:fill]}"/>}
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end
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return [xml_tag, open_tag, result, close_tag].flatten.join("\n") unless options[:qcontainer]
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svg = File.read(File.expand_path('../../qr_container.svg', __FILE__))
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svg.gsub!(/#table_number/, options[:table_number].to_s)
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svg.gsub!(/#qrcode/, result.join("\n"))
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svg
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end
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end
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end
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end
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end
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